I installed this add-on, went back to watching goofy Minecraft youtube and forgot. Looked back at blender and was like "why the heck is it red"... Then I remembered. Really funny, but I probably won't keep using it for long since I have a very excessive 2 minute autosave to /BlTemp/
This is exactly what I needed, and it works perfectly!
Also I have a suggestion: add support for adding drivers like #frame or #bpy.data.scenes["Scene"].frame_start / end. It could be done using [], {} or #(). (or something else.) Example: https://imgur.com/a/xVvxAWK